Hiram G McCormick b-1827 NY & was in Civil War

Hiram 1827 enlisted 9/15/1861 as Priv. age 35--New York City, NY. Armany Union.
My Hiram was in the Civil war being very old with sons William H. 1832, Moses 1834 and husband J Richard William of daughter Caroline E. 1843. One other son of Hiram 1804 was Osborne who died young and buried in lst. Presbyterian Church of Newark, NJ.
Searching for siblings of Hiram as well as parents.
Any help would be appreciated.
Justine